Cloth splitting attachment



Jan. 13, 1970 o. BERNATH 3,489,184

CLOTH SPLITTING ATTACHMENT 7 Filed June 11, 1968 INVENTOR OSKAR BERNATHATTORNEY United States Patent US. Cl. 139291 4 Claims ABSTRACT OF THEDISCLOSURE A cloth splitting attachment for looms having a circularblade member continuously rotated by a motor individual thereto, andsupported so as to extend between two adjacent warp threads.

BACKGROUND OF THE INVENTION The invention relates to a cloth splittingattachment for looms of the type which is adapted to divide the fabriclongitudinally after it is formed and prior to contacting the take-uproll which advances it for wind-up upon a cloth roll.

A Well known form of cloth splitting device utilizes a cutting meanssuch as a razor or knife blade that protrudes through a pair of adjacentwarp threads, With this arrangement the fabric is drawn into contactwith the cutting elements to sever the weft threads.

The disadvantage of this type of cloth splitting arrangement resides inthe fact that the threads to be severed always contact the blade at thesame point thus detrimentally affecting the life of the same. When ablade member has lost its ability to sever the weft threads cleanly saidthreads are broken in place of cutting thus resulting in frayed endswhich does not give the fabric the desired uniform appearance.

The cloth splitting attachment according to the instant inventioneliminates the undesirable conditions described above by providing acircular cutting blade which is caused to rotate continuously and whichutilizes the complete circumferential extent of its outer surface tosever the threads that are drawn into contact therewith.

SUMMARY OF THE INVENTION The thread severing mechanism of the presentinvention includes a circular blade member that is continuously rotatedby a low voltage motor individual thereto. This blade member issupported so that a portion thereof extends downwardly between twoadjacent warp threads and as the newly formed cloth is drawn forwardlyby the take-up roll, each of the weft threads are cut consecutively asthey make contact with said blade.

The present invention has for its object to provide a cloth splittingattachment which ensures a drawing cutting action, simple low-weardesign principles and universal application with optimum adjustmentrelative to the direction of movement of said cloth.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a view in side elevation andpartially in section showing a portion of a loom and the relativeposition of the mechanism according to the invention applied thereto.

FIG. 2 is a sectional view of the cloth splitting mechanism taken alongline IIII in FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawing whereinonly as much of conventional loom structure is depicted as is necessaryto a complete understanding of the invention, there is shown in FIG. 1 afabric take-up roll at 1, a pressure roll 2 over which fabric 4 isadvanced in the direction of the arrow 5 while being guided by a temple3.

The looms breast beam is identified by numeral 6 and attached thereto bymeans of screws 7 is a grooved rail 8 on which is located a sleeve 9which can be selectively fixed, by means of a screw 10 and a groovedmember 11, in a position parallel with the fabric take-up roll.

Clamped between a washer 12 and a shoulder 13 on the sleeve 9 areanti-friction bearings 14 which in turn carry a holder 16 by means ofretaining rings 15, the said holder being accordingly capable of beingswung horizontally. A horizontally disposed bar 17 is clamped in theholder 16 by means of a set screw 18.

A bolt 20 assembled in the clamping head 19 of the bar 17 is verticallyadjustable and can be fixedly positioned by means of a screw 21.

Bolt 20 supports, by means of a screw 23, a plate 22 on which a gearmotor 25 is mounted by means of attaching members 24. The gear motor 25imparts a r0- tary motion to a circular cutter blade 26 and the variouspossibilities of adjustment enable said circular cutter to be set topenetrate into the fabric 4 between the temple 3 and take-up roll 1 tothe desirable depth.

FIG. 2 shows a section of the circular cutter blade 26 along line II-IIin FIG. 1 and the plate 22 to which the gear motor 25 is attached bymeans of attaching members 24. The gear motor 25 is provided with ashaft 34 on which a driving disc 27 is assembled by means of a set screw28 that in turn drives the circular cutter blade 26 having acircumferential cutting edge 30 by means of a follower pin 29.

A two-pole supply line 31 for a low voltage of 12 volts enables thenecessary electrical energy to be supplied to the gear motor 25 so thatthe hazard of accidents is eliminated on the one hand while, on theother, installation is simplified because the low-voltage control poweris available on most looms.

Because of the rotary arrangement of the holder 16 the circular cutterblade 26 is adapted to follow any change in position of the fabric 4which may occur particularly following extended stoppage of the weavingprocess.

It is possible to arrange the cloth splitting attachment at a locationother than between the temple and the take-up roll; in all eventshowever, it should be positioned forwardly of the temple. It may bereadily employed for severing the weft threads in looms weaving singleas well as multiple width fabrics.

The proper selection of the thickness of the driving disc 27 enables thelength 32 (FIG. 2) of the weft yarn ends projecting from the warp thread33 of a web of fabric to be determined and the suitable choice of thethickness of the circular cutter blade 26, determines the length 35 ofthe weft thread ends projecting from the warp thread 36 of the other webof fabric.

While one embodiment of the invention has been disclosed, it is to beunderstood that the inventive concept may be carried out in a number ofways. This invention is, therefore, not to be limited to the precisedetails de scribed but is intended to embrace all variations andmodifications thereof falling within the spirit of the invention and thescope of the claims.

Patented Jan. 13, 1970 I claim:

1. A cloth splitting attachment for looms having temple members forsupporting and guiding the cloth adjacent its edges and a take-up rollfor advancing said cloth as it is formed, said splitting attachmentincluding (a) a circular cutter blade (b) a geared and synchronous typemotor individual to and for continuously rotating said cutter blade,

(c) a clamping head for adjustably supporting said motor and blade toobtain desired penetration of the latter into the cloth, and

(d) a pivotable holder adapted to carry said attachment whereby saidcutter blade will automatically align itself between a selected pair ofadjacent warp threads in the event of possible lateral change inposition of said cloth.

2. The cloth splitting attachment according to claim 1 wherein saidcircular cutter blade is driven by a 01- lower pin arranged on a drivingdisc attached to said motor.

3. The cloth splitting attachment according to claim 2 wherein thethickness of said driving disc determines the length of the weft threadends projecting from one edge of severed cloth.

4. The cloth splitting attachment according to claim 3 wherein thethickness of the circular cutter blade determines the length of the Weftthread ends projecting from one edge of severed cloth.

References Cited UNITED STATES PATENTS JAMES KEE CHI, Primary ExaminerU.S. Cl. X.R.

